Crohn’s disease, also known as limited enteritis, segmental enteritis, or granulomatous small bowel colitis, is a chronic inflammatory granulomatous disease of the gastrointestinal tract of unknown etiology. The lesions are mostly found in the terminal ileum and adjacent colon, often in a segmental distribution. The age of onset is mostly between 15 and 30 years, and the incidence is the same in both sexes. The clinical manifestations of Crohn’s disease are related to the location, extent, severity, duration of the disease and the presence of complications, and the symptoms are diverse: 1. 2, a few acute onset, there may be high fever, toxemia symptoms and acute abdominal manifestations, the whole course of the disease is short, abdominal symptoms are serious, and there are more serious complications. Occasionally, extra-intestinal manifestations such as perianal abscess, fistula formation or arthralgia are the first symptoms, and abdominal symptoms are not obvious. Crohn’s disease is generally treated with internal medicine, including: rest, high nutrition, less dregs diet, prednisone, oral salbutamol, antibiotics, metronidazole, tranquilizers, antispasmodics, and parenteral nutrition when necessary. Indications for surgical treatment are: ① persistent Crohn’s disease ② obstruction ③ chronic perforation followed by formation of abdominal abscess, intestinal (external) fistula ④ hemorrhage ⑤ toxic megacolon ⑥ acute perforation ⑦ severe perianal lesion ⑧ cancer. Surgery should be performed to remove the diseased intestinal canal, including the near and distal normal intestinal canal 5 to 10 cm, and do end-to-end intestinal anastomosis. If local adhesions are severe and cannot be separated, the normal intestinal canal should be cut off at 5-10 cm proximal to the lesion, the distal end should be closed by inversion, and the proximal intestinal canal should be anastomosed with the transverse colon. 3-6 months later, the lesioned intestinal segment should be removed by second-stage surgery.